Friction brake



Jan. 5, 1932. I J 5, THOMPSON 1,839,510

FRI GTION BRAKE Original Filed March 18, 1 26 Patented Jan. 5, 1932 UNITED STATES PATENT OFFICE CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK FRICTION BRAKE Original application. filed March 18, 1926,- Serial No. 95,602. Divided and this application filed December 3,

1928. Serial This is a division of my application Serial No. 95,602 filed March 18, 1926. I,

The invention relates to friction brakes, and while it is particularly adapted for expanding brakes arranged to make frictional contact with a drum, which is a form of brake commonly employed in automotive vehicles, it is also useful in many other installations as will be apparent to those skilled in the art.

The object of the invention is to-provide a brake assembly comprising a skeleton head, one or more detachable friction shoes, and

novel means of simple construction for securing each shoe on the head whereby the shoe will be securely held in position on the head and may be easily installed and replaced. For thepurposes of this application I have illustrated theinvention in several embodi- 29 ments for'an expanding brake for automotive vehicles in the accompanying drawings and referring thereto a Fig. 1 is an elevation, partly in section, showing a head provided with three shoes.

different specific forms of the fastening means. i

Referring to the drawings the head 5 has an eye 6 at one end to engage a pivot ,stud and its other end is formed or provided with a bearing 7 to be engaged by the cam or any other means- (not shown) which may be employed for swinging the head on its pivot to move the shoes 8 into and out of operative contact with a drum. The shoes are suitably seated on the face of the head and each shoe comprises a body 9 and a back 10 which may be in the form of a shell having sides 11 and ends 12. Projections 13 are provided at the the form of a shell, as shown, the pro ections Figs. 2, 3 and 4 are detail views showing ends of the back and if the back is made in the projections of adjacent shoes so that one bolt will engage both projections for fastening the shoes to the head.

The invention provides efficient means of simple construction whereby one or more friction shoes or blocks may be easily and securely fastened in place on the head of a friction brake assembly. The head may be variously constructed for this invention and it may have side guides 18 and end stops 19 as more fully set forth in my original application. v

The invention may be embodied with brake heads and brake shoes and brake blocks of different kinds and constructions, and I" JAMES S. THOMPSON, OF NEW YORK, N. Y., ASSIGNOR T0 AMERICAN BRAKE MATERIALS i embodiments, within the scope of the following claims.

1. The combination of a brake head, a friction shoe seated on the head and comprising a body and a shell back on the body, said back having upturned ends and said ends being out between the side edges of the-back and bent to provide projections extending outwardly from the ends of the back, said' projections having openings therein, and means engaging the openings in said projections and the head for securing the shoe to 'the' head.

2. The combination of a brake head, friction shoes seated on the head in endwise alignment and having shell backs, parts of the backs of less width than the backs projecting from the ends thereof and having openings therein and being disposed inoverlapping relation withthe openings therein in alignment, and means engaging the aligned openings and the head for securing the shoes to the head.

JAMES S. THOMPSON. 

